243400421143 has 8 divisors (see below), whose sum is σ = 265580675856. Its totient is φ = 221228990400.

The previous prime is 243400421141. The next prime is 243400421149. The reversal of 243400421143 is 341124004342.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 243400421143 - 2¹ = 243400421141 is a prime.

It is a super-2 number, since 2×243400421143² (a number of 24 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (243400421141) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2148246 + ... + 2258707.

It is an arithmetic number, because the mean of its divisors is an integer number (33197584482).

Almost surely, 2^243400421143 is an apocalyptic number.

243400421143 is a deficient number, since it is larger than the sum of its proper divisors (22180254713).

243400421143 is a wasteful number, since it uses less digits than its factorization.

243400421143 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4411985.

The product of its (nonzero) digits is 9216, while the sum is 28.

Adding to 243400421143 its reverse (341124004342), we get a palindrome (584524425485).

The spelling of 243400421143 in words is "two hundred forty-three billion, four hundred million, four hundred twenty-one thousand, one hundred forty-three".